1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1989, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif not lint 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)nfsiod.c 8.4 (Berkeley) 5/3/95"; 46 #endif 47 static const char rcsid[] = 48 "$FreeBSD: src/sbin/nfsiod/nfsiod.c,v 1.9 1999/08/28 00:13:55 peter Exp $"; 49 #endif not lint 50 51 #include <sys/param.h> 52 #include <sys/syslog.h> 53 #include <sys/wait.h> 54 #include <sys/mount.h> 55 #include <sys/time.h> 56 57 #include <nfs/rpcv2.h> 58 #include <nfs/nfs.h> 59 60 #include <err.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <unistd.h> 64 65 /* Global defs */ 66 #ifdef DEBUG 67 int debug = 1; 68 #else 69 int debug = 0; 70 #endif 71 72 void nonfs __P((int)); 73 void reapchild __P((int)); 74 void usage __P((void)); 75 76 /* 77 * Nfsiod does asynchronous buffered I/O on behalf of the NFS client. 78 * It does not have to be running for correct operation, but will 79 * improve throughput. 80 */ 81 int 82 main(argc, argv) 83 int argc; 84 char *argv[]; 85 { 86 int ch, num_servers; 87 struct vfsconf vfc; 88 int error; 89 90 error = getvfsbyname("nfs", &vfc); 91 if (error && vfsisloadable("nfs")) { 92 if (vfsload("nfs")) 93 err(1, "vfsload(nfs)"); 94 endvfsent(); /* flush cache */ 95 error = getvfsbyname("nfs", &vfc); 96 } 97 if(error) 98 errx(1, "NFS support is not available in the running kernel"); 99 100 #define MAXNFSDCNT 20 101 #define DEFNFSDCNT 1 102 num_servers = DEFNFSDCNT; 103 while ((ch = getopt(argc, argv, "n:")) != -1) 104 switch (ch) { 105 case 'n': 106 num_servers = atoi(optarg); 107 if (num_servers < 1 || num_servers > MAXNFSDCNT) { 108 warnx("nfsiod count %d; reset to %d", 109 num_servers, DEFNFSDCNT); 110 num_servers = DEFNFSDCNT; 111 } 112 break; 113 case '?': 114 default: 115 usage(); 116 } 117 argc -= optind; 118 argv += optind; 119 120 /* 121 * XXX 122 * Backward compatibility, trailing number is the count of daemons. 123 */ 124 if (argc > 1) 125 usage(); 126 if (argc == 1) { 127 num_servers = atoi(argv[0]); 128 if (num_servers < 1 || num_servers > MAXNFSDCNT) { 129 warnx("nfsiod count %d; reset to %d", num_servers, 130 DEFNFSDCNT); 131 num_servers = DEFNFSDCNT; 132 } 133 } 134 135 if (debug == 0) { 136 daemon(0, 0); 137 (void)signal(SIGHUP, SIG_IGN); 138 (void)signal(SIGINT, SIG_IGN); 139 (void)signal(SIGQUIT, SIG_IGN); 140 (void)signal(SIGSYS, nonfs); 141 } 142 (void)signal(SIGCHLD, reapchild); 143 144 openlog("nfsiod:", LOG_PID, LOG_DAEMON); 145 146 while (num_servers--) 147 switch (fork()) { 148 case -1: 149 syslog(LOG_ERR, "fork: %m"); 150 exit (1); 151 case 0: 152 if (nfssvc(NFSSVC_BIOD, NULL) < 0) { 153 syslog(LOG_ERR, "nfssvc: %m"); 154 exit (1); 155 } 156 exit(0); 157 } 158 exit (0); 159 } 160 161 void 162 nonfs(signo) 163 int signo; 164 { 165 syslog(LOG_ERR, "missing system call: NFS not available"); 166 } 167 168 void 169 reapchild(signo) 170 int signo; 171 { 172 173 while (wait3(NULL, WNOHANG, NULL) > 0) { 174 /* nothing */ 175 }; 176 } 177 178 void 179 usage() 180 { 181 (void)fprintf(stderr, "usage: nfsiod [-n num_servers]\n"); 182 exit(1); 183 } 184